Milorganite Deer Repellent Review

Not So “Natural” Deer Repellent

It says organic on the bag, but it’s city sewage facility solids, and not all heavy metals, flushed chemicals or pharmaceuticals have been destroyed. This product is actually incinerated municipal sludge sold as a fertilizer, and cannot be marketed under deer repellents without extensive testing ordered by the EPA.  Supposedly due to the cost involved, the manufacturer declined to do the testing ordered in 2005. We suggest that with the amount of profit to be claimed nationwide as an affordable and easily obtainable deer deterrent, that these claims may be purely newsworthy.

Milwaukee Metropolitan Sewage District

The makers of Milorganite do not register it as a repellent, or actively market it as such.

In 2009, the U.S. Environmental Protection Agency biopesticides division required Milorganite to complete additional environmental and health tests, which would costs between $1-2 million and would take years to complete. These tests would not guarantee approval of the request to market Milorganite as a deer repellent.   Milorganite, owned and operated by the Milwaukee Metropolitan Sewage District, decided it was not in the best interest of community to ask to spend millions of dollars without a guaranteed return on investment.

Note: They have declined the request from the EPA in both 2005 and 2009. Additionally, the amount of nitrogen available in this biosolids fertilizer has dropped an entire percent in the past 2 years due to the closing of the nearby Red Yeast Factory that was feeding higher levels of nutrients to the sewage treatment plant that produces Milorganite.

  • Application Type: granular
  • Deer Control Method: smell
  • Active Ingredients: human waste – sewer sludge
  • Rain Resistant: up to 3 months in normal rainfall. Heavy rain and snowfall will make it necessary to reapply more often. For improved rain resistance, mix with a sticker agent before spraying plants.
  • Chemical Makeup: processed human waste may contain pharmaceuticals
  • EPA Registered: Not as a deer repellent
  • Plant Safety: Not applied to foliage. Thought to be non-burning to most plants.
  • Professional Endorsement: none


Where To Buy:
You will find this brand of deer damage control available around town, and online.

Total Cost & Coverage per Unit:

Ready To Use (RTU):

** No official application rate is stated on the bag in accordance with EPA rulings that Milorganite cannot be classified as a pesticide.

**An unofficial application rate of 4 ounces per plant is found online as a deer deterrent. It is not advisable to apply human waste to food crops.

Application Instruction:

None – – in accordance with failure to comply with EPA requested testing necessary to be listed or labeled as a pesticide. (2005, 2009)

Good Reasons Not To Use As Fertilizer

Actual User Comments:


1.) Northern Michigan… does not work for even one week against white tailed deer or rabbits. Applied by broadcast fertilizer spreader at twice the rates defined on the bag TWICE along the same path around the perimeter of  the property that enclosed vegetable and flower gardens. We believe we heard the predators hooting with laughter as they crossed the supposedly ‘terrifying’ boundary. Perhaps the deer in northern Georgia just aren’t as progressed as they are 1200 miles north. (Or only a couple hundred miles east – see item #2.)

2.) South Central Carolina… does not work for one day against marauding deer on extensive and costly newly installed landscaping in the suburbs of Charlotte. Applied at double the rates found on the bag for fertilizer TWICE along the same path around the developed perimeter of a residential property. Thousands of dollars of perennial plants and flowering shrubs destroyed in less than two weeks after heavy applications of Milorganite.


“Milorganite works for about a week. I would call it more a Deterrent than a Repellent – sort of like you might stay away from a free juicy steak if the restaurant smelled, or you might not.”   andy10917/

“Some people claim that Milorganite repels deer but this has not been established. Probably the smell keeps them away. If it really does repel deer I would have to wonder about the safety since sometimes animals know better than people what is healthy for them.”  becky2259/

Milorganite is not registered with the US EPA as a deer repellent and cannot be sold as one.”  Milorganite page/

Refund Policy:

Inquire at the time of purchase.

Milorganite Deer Repellent Review was last modified: by